Abstract

We fabricate superconductingion traps with niobium and niobium nitride and trap single ions at cryogenic temperatures. The superconducting transition is verified and characterized by measuring the resistance and critical current using a four-wire measurement on the trap structure, and observing change in the rf reflection. The lowest observed heating rate is 2.1(3) quanta/s at 800 kHz at 6 K and shows no significant change across the superconducting transition, suggesting that anomalous heating is primarily caused by noise sources on the surface. This demonstration of superconductingion traps opens up possibilities for integrating trapped ions and molecular ions with superconducting devices.